Diagnostic apparatus



FIG. 1 is a perspective view of the invention, the cord shown in dashed lines in this and subsequent FIGS. 2-4 being disclaimed;

FIG. 2 is a front elevational view of the invention showing the inactive display screen;

FIG. 3 is a rear elevational view of the invention;

FIG. 4 is a side view of the invention taken from the top as seen in FIG. 3, the opposite side view being identical; and,

FIG. 5 is an end view taken from the left side as shown in FIG. 4. 

CLAIM The ornamental design for a diagnostic apparatus, as shown and described. 